I recently saw an episode of "Ask This Old House" and one of the projects was installing a toilet in the basement. From the question I am assuming that this is a similar situation. The way they approached the problem was to install a small box (sorry, can't remember exactly what is was called) and the box contained a pump. It was electric and plugged into a nearby outlet. Anyway, this pump would turn on after the toilet was flushed and pump the waste up and out. They may have a better description of the project on their website, or I'm sure a local Home Depot or similar store would have this particular pump. Hope that helps.
If your existing waste and drains drop below the concrete slab, a sewage ejector like the first response indicated may not be needed. Simply plumb new lines below the slab and connect properly to the existing drain lines. Be sure to slope and vent properly with correct pipe sizes.